This specification is for Lennox Industries Energence rooftop by mikesanye



           This specification is for [Lennox Industries Energence ] rooftop units. Revise specification section number and title
           below to suit project requirements, specification practices and section content. Refer to CSI MasterFormat for other
           section numbers and titles.
           Optional text and text that requires a decision are indicated by bold brackets [ ] and proprietary information is indicated
           by bold italic brackets[ ]; delete text that is not needed in final copy of specification. Specifier Notes typically precede
           specification text; delete notes in final copy of specification. Trade/brand names with appropriate symbols typically are
           used in Specifier Notes; symbols are not used in specification text. Metric conversion, where used, is soft metric

                                                               SECTION 237433
                                                UNITARY AIR CONDITIONING EQUIPMENT
     A. Section Includes: Packaged rooftop units and commercial packaged, gas/electric and electric/electric

Specifier Note: Revise paragraph below to suit project requirements. Add section numbers and titles per CSI MasterFormat and
specifier’s practice.
      B.    Related Sections:
Specifier Note: Article below may be omitted when specifying manufacturer’s proprietary products and recommended installation.
Retain Reference Article when specifying products and installation by an industry reference standard. If retained, list standard(s)
referenced in this section. Indicate issuing authority name, acronym, standard designation and title. Establish policy for indicating
edition date of standard referenced. Conditions of the Contract or Division 1 References Section may establish the edition date of
standards. This article does not require compliance with standard, but is merely a listing of references used. Article below should
list only those industry standards referenced in this section. Retain only those reference standards to be used within the text of
this Section. Add and delete as required for specific project.
     A. Agency Listings:
          1.   Intertek ETL
          2.   Canadian Standards Association (CSA).
     B. Safety Standards:
          1.   Underwriters Laboratories (UL).
          2.   Underwriters Laboratories of Canada (ULC).
          3.   National Electric Code (NEC).
          4.   Canadian Electric Code (CEC).
     C. Air-Conditioning, Heating and Refrigeration Institute (AHRI):
          1.   AHRI 340/360 Commercial and Industrial Unitary Air-Conditioning and Heat Pump Equipment.
          2.   AHRI 370 Sound Rating of Large Outdoor Refrigerating and Air Conditioning Equipment.
          3.   AHRI 210/240 Performance Rating of Unitary Air Conditioning and Air-Source Heat Pump Equipment.
     D. American Society for Testing and Materials (ASTM):
          1.   ASTM B117 – Standard Practice for Operating Salt Spray.
          2.   ASTM 1153 – Standard Method for Methyl Isobutyl Ketone.
     E. ISO 9001, Quality Management Systems.
     F.   Meet Military Specification MIL-P-53084
Specifier Note: Article below should be restricted to statements describing design or performance requirements and functional
(not dimensional) tolerances of a complete system. Limit descriptions to composite and operational properties required to link
components of a system together and to interface with other systems.
      A. Performance Requirements:
Specifier Note: Article below should be restricted to Energence® (LG) gas/electric packaged roof top units or Energence® (LC)
electric/electric packaged roof top units.
            2.     [ 3, 4, 5, 6, 7.5, 8.5, 10, 12.5, 13, 15, 17.5, 20, and 25 ton capacity.]
            3.    Electrical Characteristics:
                  a.     60 Hz
208/230 volt single phase is optional for the 3, 4 and 5 ton ECM models only. All 3 Phase voltages available on 3-25 ton
Energence RTU’s.

                 b.   [208/230 v – 1 Phase] [208/230 v – 3 Phase] [460 v – 3 Phase] [575 v – 3 Phase]
Specifier Note: Article below includes submittal of relevant data to be furnished by Contractor before, during or after construction.
Coordinate this article with Architect’s and Contractor’s duties and responsibilities in Conditions of the Contract and Division 1
Submittal Procedures Section.
     A. General: Submit listed submittals in accordance with Conditions of the Contract and Division 1 Submittal Procedures.
     B. Product Data: Submit product data for specified products.
     C. Shop Drawings:
          1. Submit shop drawings in accordance with Section 01330 - Submittal Procedures.
          2. Indicate:
             a.    Equipment, piping and connections, together with valves, strainers, control assemblies, thermostatic controls,
                   auxiliaries and hardware, and recommended ancillaries which are mounted, wired and piped ready for final
                   connection to building system, its size and recommended bypass connections.
             b.    Piping, valves and fittings shipped loose showing final location in assembly.
             c.    Control equipment shipped loose, showing final location in assembly.
             d.    Dimensions, internal and external construction details, recommended method of installation with proposed structural
                   steel support, mounting curb details, sizes and location of mounting bolt holes; include mass distribution drawings
                   showing point loads.
             e.    Detailed composite wiring diagrams for control systems showing factory installed wiring and equipment on packaged
                   equipment or required for controlling devices or ancillaries, accessories and controllers.
             f.    Fan performance curves.
             g.    Details of vibration isolation.
             h.    Estimate of sound levels to be expected across individual octave bands in dB.
             i.    Type of refrigerant used.
             j.    Plan view, front view end view, back view and curb detail with dimensions.
     D. Quality Assurance:
          1. Test Reports: Certified test reports showing compliance with specified performance characteristics and physical properties.
          2. Certificates: Product certificates signed by manufacturer certifying materials comply with specified performance
             characteristics and criteria and physical requirements.
          3. Manufacturer’s Instructions: Manufacturer’s installation instructions.
Specifier Note: Coordinate paragraph below with Part 3 Field Quality Requirements Article herein. Retain or delete as applicable.
      E.  Manufacturer’s Field Reports: Manufacturer’s field reports specified.
      F.  Closeout Submittals: Submit following:
          1.   Warranty: Warranty documents specified.
          2.   Operation and Maintenance Data: Operation and maintenance data for installed products in accordance with Division 1
               Closeout Submittals (Maintenance Data and Operation Data) Section. Include methods for maintaining installed products
               and precautions against cleaning materials and methods detrimental to finishes and performance. Include names and
               addresses of spare part suppliers.
          3.   Provide brief description of unit, with details of function, operation, control and component service.
          4.   Provide equipment inspection report and equipment operation test report.
          5.   Commissioning Report: Submit commissioning reports, report forms and schematics in accordance with Section 01810 -
     A. Qualifications:
          1.   Installer experienced in performing work of this section who has specialized in installation of work similar to that required
               for this project.
          2.   Pre-installation Meetings: Conduct pre-installation meeting to verify project requirements, manufacturer’s installation
               instructions and manufacturer’s warranty requirements. Comply with Division 1 Project Management and Coordination
               (Project Meetings).
     A. General: Comply with Division 1 Product Requirements.
     B. Ordering: Comply with manufacturer’s ordering instructions and lead time requirements to avoid construction delays.
     C. Packing, Shipping, Handling and Delivery:
          1.   Deliver materials in manufacturer’s original, unopened, undamaged containers with identification labels intact.
          2.   Ship, handle and unload units according to manufacturer’s instructions.
     D. Storage and Protection:
          1.   Store materials protected from exposure to harmful weather conditions.

          2.  Factory shipping covers to remain in place until installation.
     A. Installation Location: [Confirm design conditions and temperature.].
Specifier Note: Coordinate article below with Conditions of the Contract and with Division 1 Closeout Submittals (Warranty).
     A. Project Warranty: Refer to Conditions of the Contract for project warranty provisions.
     B. Manufacturer’s Warranty: Submit, for Owner’s acceptance, manufacturer’s standard warranty document executed by authorized
          company official. Manufacturer’s warranty is in addition to, and not a limitation of, other rights Owner may have under Contract
Specifier Note: “Aluminized Heat Exchanger” and “Stainless steel Heat Exchanger” limited warranty is only available on
Energence (LG) Gas/Electric models. “Compressor” and “Other System Components” are covered on all Energence units.
      C.   Warranty: Commencing on Date of Installation.
           1.  Compressors: 5 years (limited).
           2.  Other Covered System Components: 1 year (limited).
           3.  [Aluminized Heat Exchangers: 10 years (limited).] [Stainless Steel Heat Exchangers: 15 years (limited).]
           4.    Prodigy™ Unit Controller 3 years (limited).

Specifier Note: Retain article below for proprietary method specification. Add product attributes, performance characteristics,
material standards and descriptions as applicable. Use of such phrases as “or equal” or “or approved equal” or similar phrases
may cause ambiguity in specifications. Such phrases require verification (procedural, legal and regulatory) and assignment of
responsibility for determining “or equal” products.
     A. Manufacturer: Lennox Industries Inc.
          1. Contact: 2100 Lake Park Blvd., Richardson, TX 75080; Telephone: (800) 453-6669; website:
      B.   Proprietary Products/Systems: Lennox Energence Packaged Rooftop Units, including the following equipment:
           1.   Cabinet:
                a.    Heavy gauge steel panels.
                b.    Pre-painted steel panels.
                c.    Heavy Gauge galvanized steel base rail.
                d.    Rigging holes on all four corners.
                e.    Forklift slots (on three sides, not directly below condenser coil) on base rail.
                f.    Raised or flanged edges around duct and power entry openings.
Specifier Note: “Downflow” is the standard configuration that all Energence units are shipped.
Specifier Note: “Horizontal Flow” is an option for all Energence™ models. [Horizontal return airflow with Horizontal Roof
    Mounting Frame] [And Horizontal Return Air Panel Kit (may be required when converting down-flow configured unit to
    horizontal airflow)].
                 g.   [Horizontal] Air Flow configuration Kit or Conversion Curb
Specifier Note: add the “and gas lines” only if using an Energence (LG) gas/electric model.
                h.   Electrical lines [and gas lines] can be brought through the base of the unit or through horizontal knockouts.
                i.   Insulation:
                     1)    All panels adjacent to conditioned air are fully insulated with foil faced fiberglass insulation.
                     2)    Unit base is fully insulated.
                     3)    Unit base insulation also serves as a roof curb seal.
                j.   Access Panels: Hinged for compressor/controls/heating areas, blower access and air filter/economizer access; and,
                     sealed with quarter-turn latching handles and tight air and water seal.
                k.   Corrosion resistant double sloped condensate Drain Pan.
                l.   Service Valves
Specifier Note: “Factory Installed Options” are options that can be selected for the Energence rooftop units. The “Factory
Installed Options” are installed at the Lennox manufacturing facility.

Specifier Note: “Field Installed Accessories” are options that can be selected for the Energence roof top units. The “Field
Installed Accessories” are shipped separately and installed in the field.

          2.   Cooling System:
               a.    Refrigerant type: R-410A.
               b.    Capable of operating from 0 - 125 degrees F (-18 - 52 degrees C) without installation of additional controls.
               c.    Compressors:
                     1)    Scroll Type.
                     2)    Resiliently mounted on rubber mounts for vibration isolation.
                     3)    Overload Protected
                     4)    Internal excessive current and temperature protection
                     5)    Isolated from condenser and evaporator fan air streams
                     6)    Refrigerant cooled
               d.    TXV
               e.    High pressure switch
               f.    Freezestat
               g.    High capacity filter driers
               h.    Crankcase heater
               i.    Low pressure switch
          3.   Coil Construction:
               a.    Condensing/evaporator coil general construction:
                     1)    Aluminum Rippled and Lanced fins.
                     2)    Copper tube construction.
                     3)    Aluminum fins mechanically bonded to copper tubes.
                     4)    All coils are high pressure leak tested at manufacturing facility.
               b.    Evaporator Coils:
                     1)    With balanced port thermal expansion valves, freeze protection on each compressor circuit, pressure and leak
                           tested to 500 psi.
                     2)    Each compressor circuit on coil divided across face of coil and active through full depth of coil.
                     3)    [With flexible immersed coating electrodeposited by dry film process, meets standards: Military
                           Specification MIL-P-53084, ASTM B117 and ASTM 1153].
               c.    Condenser Coils:
                     1)    [With flexible immersed coating electrodeposited by dry film process, meets standards: Military
                           Specification MIL-P-53084, ASTM B117 and ASTM 1153].
          4.   Wiring:
               a.    Keyed and labeled connections, color coded and continuously marked wire to identify point-to-point component
               b.    Not in contact with hot-gas refrigerant lines or sharp metal edges.
Specifier Note: Energence units with Gas Heating Systems are LG models.
          5.   Gas Heating System:
               a.  Induced draft
               b.  Natural gas fired system with direct spark ignition
               c.  Electronic flame sensors
               d.  Flame rollout switches
               e.  High heat limit switches
               f.  Induced draft failure switch and capable of operating to altitude of 2000 feet (610 m) with no derate to manifold
               g.  Service access for controls, burners and heat exchanger
               h.  Heat Exchanger:
                   1)    Tubular Design
                   2)    [Aluminized steel] [Stainless steel].
               i.  Gas piping system tight and free of leaks when pressurized to maximum supply pressure.
               j.  Gas Valve: redundant type gas heat valve with manual shutoff
               k.  [Single stage gas heating] [Two stage gas heating, available on 4 to 25 ton models only]
               l.  Gas Burners: Aluminized steel inshot-type gas burners
               m. Direct spark pilot ignition
               n.  Fan and Limit Control
               o.  Safety Switches
               p.  Gas piping system tight and free of leaks

                 q.    [Low NOx]
Specifier Note: “Field Installed Accessories” are options that can be selected for the Energence LG Gas/Electric models. The
“Field Installed Accessories” are shipped separately and installed in the field.
                 r.   Field Installed Accessories:
                      1)   [Combustion Air Intake Extensions]
                      2)   [Vertical Vent Extension Kit]
                      3)   [LPG/Propane Kit]
                      4)   [Low Temperature Vestibule Heater]
Specifier Note: The “Electric Heating System” is an option for Energence (LC), electric/electric models only. The “Electric
Heating System” is only available for factory or field installation.
           6.    Electric Heating System:
                 a.    Electrical resistance heater
                 b.    Reset thermal limit protection
                 c.    Single point power supply
                 d.    Heater Element:
                       1)    Nickel chromium wire
                       2)    Individually fused.
                 e.    Electric heater slides out of unit for service
           7.    Heating Controls:
Specifier Note: 2 stages of heating control are only available on Energence (LG) gas/electric models of tonnages 4-25, on two
stage units.
                a.    Support 2 stages of heating control from thermostat or DDC
                b.    With delay time of 30 seconds between low and high heat stages
           8.   Supply Air Fan Motor and Drives:
Specifier Note: Direct drive ECM motors available on 3-5 tons only.
                a.    [Direct Drive ECM] [Belt drive]
                b.    Permanently lubricated ball bearings (for belt drive motors)
                c.    Thermal overload protected motors with automatic reset
                d.    Adjustable sheaves on belt drive motors for blower speed adjustment
                e.    Optional low and high static motor/drive combinations and optional drive kits
                f.    [Auto Blower Belt Tensioner: Factory]
           9.   Supply Air Fan:
                a.    Double inlet type, galvanized steel with forward curved blades
                b.    Statically and dynamically balanced
                c.    Continuous or automatic control for occupied periods
           10. Supply Air Filters:
                a.    Disposable 2 inch
           11. Condenser Fan Motor:
                a.    ECM motors on 3-5 ton models. Direct drive with permanently lubricated ball bearings. With the exception of the first
                      sentence, these three items (a, b, c) are not mentioned in the EHB
                b.    Watertight with thermal overload protection and automatic reset
                c.    Motor mount isolated from fan safety guard
           12. Condenser Fans:
                a.    Corrosion resistant propeller type
           13.   Unit Controller:
                 a.   Solid state control board to operate unit
                 b.   Scrolling digital display
                 c.   Shall provide a 5° F temperature difference between cooling and heating set points to meet ASHRAE 90.1 Energy
                 d.   Shall provide and display alarms, alarm history and system status
                 e.   Service run test capability
                 f.   Shall accept input from a CO2 sensor (both indoor and outdoor)
                 g.   Economizer control
                 h.   Blower on/off delay
                 i.   2-stage heat/4-stage cool thermostat compatible and warm-up mode
                 j.   Diagnostics code storage
                 k.   DDC compatible

                  l.    Indoor air quality input
                  m.    Low ambient controls
                  n.    Runtime
                  o.    Blower proving switch strike 3
                  p.    [Phase/voltage monitoring/protection: Factory]
                  q.    Realtime clock (timestamps)
                  r.    Guided setup
                  s.    USB memory stick communication interface
                  t. Controls Options:
                                   1) [CO2 Sensor: Field Mounted]
                                   2) [Dirty Filter Switch: [Field] [Factory]]
                                   3) [Blower Proving Switch: [Field] [Factory]]
                                   4) [Phase Monitor: [Field] [Factory]]
                                   5) [BACnet Interoperability: Factory]
                                   6) [LonTalk Interoperability: Factory]
                                   7) [Novar ETM-2051: Factory]
                                   8) [Novar LSE Module: Factory]
                                   9) [CPC Direct Interface: Factory]
                                   10) [Fresh Air Tempering Sensor: Field]
           14. Accessories:
                a.   [Economizer Single Sensible: [Field] [Factory]]
                b.   [Economizer Differential Dual Sensible: [Field] [Factory]]
                c.   [Economizer Global: Factory]
                 d.  [Economizer Single Enthalpy Control: [Field] [Factory]]
                 e.  [Economizer Differential Dual Enthalpy Control: [Field] [Factory]]
                f.   [Motorized Outdoor Air Damper: [Field] [Factory]]
                g.   [Manual Outdoor Air Damper: [Field] [Factory]]
                h.   [Dehumidification system with secondary coil: Factory]
Specifier Note: Barometric relief damper is included with factory or field installed economizer.
                i.   Barometric relief damper
                j.   [Power exhaust fan: [Field] Factory]]
                k.   [Smoke detector supply: [Field] [Factory]]
                l.   [Smoke detector return: [Field] [Factory]]
                m. [Roof curb: Field]
                n.   [Outdoor air hood: Field]
                o.   [Barometric relief damper hood: Field]
                p.   [Energy Recovery System: Field Mounted]
                q.   [Ceiling Diffuser: Field] [Flush] [Step down]
                r.   [Transition: Field] [Supply] [Return]
                s.   [UVC lamps: [Field] [Factory]]
                t.   [2” MERV 13 Filters: [Field] [Factory]]
                u.   [2” MERV 8 Filters: [Field] [Factory]]
                v.   [Coil Guards: [Field]] [Hail Guards: [Field]]
                w. [Disconnect Switch: [Field] [Factory]]
                x.   [Condensate drain trap plastic: [Field] [Factory]] [Condensate drain trap copper: [Field] [Factory]]
                y.   [GFCI Service Outlets (field wired) [Field] [Factory]] [GFCI Service Outlets (unit powered, available on 13 to 25
                     ton models only): Factory]
                z.   [Circuit breaker: Factory]

Specifier Note: Edit article below to suit project requirements. If substitutions are permitted, edit text below. Add text to refer to Division 1
Project Requirements (Product Substitutions Procedures) Section.
      A. Substitutions: No substitutions permitted.
Specifier Note: Revise article below to suit project requirements and specifier’s practice.

      A.  Compliance: Comply with manufacturer’s written data, including product technical bulletins, product catalog installation
          instructions, product carton installation instructions and manufacturer’s SPEC-DATA sheets.
     A. Site Verification of Conditions: Verify substrate conditions, which have been previously installed under other sections, are
          acceptable for product installation in accordance with manufacturer’s instructions
     A. Install [Packaged rooftop units] [And] [Commercial packaged, gas/electric, electric/electric and electric/heat pumps] in
          accordance with manufacturer’s instructions [On roof curbs provided by manufacturer] [As indicated].

                                                         END OF SECTION

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